BACKGROUND: A number of novel Helicobacter species have been isolated from both animals and humans. Many of these helicobacters colonize the lower gastrointestinal tract and hepatobiliary tract and are associated with diseases. METHODS: A spiral-shaped bacterium, with bipolar single-sheathed flagella, was isolated from the liver and cecum of mastomys (the African rodent, Mastomys natalenis), from the feces and ceca of normal mice, and also from the cecum of a mouse with proctitis. 16S ribosomal RNA gene sequence analysis, restriction fragment length polymorphism (RFLP) and fluorophore-enhanced repetitive element polymerase chain reaction (FERP or rep-PCR) analysis were used to classify the organism. RESULTS: The bacterium grew at 37 and 42 degrees C under microaerobic conditions, rapidly hydrolyzed urea, and was catalase and oxidase positive. It did not reduce nitrate to nitrite, and was resistant to cephalothin and nalidixic acid. Like many other enterohepatic Helicobacter species, this organism expressed cytolethal distending toxin and causes cell distention. CONCLUSIONS: The organism was classified as a novel Helicobacter species for which we propose the name 'Helicobacter mastomyrinus'. Although 'H. mastomyrinus', like Helicobacter hepaticus and Helicobacter bilis, colonizes the liver of rodents, the pathogenic potential of this novel helicobacter is unknown.
BACKGROUND: A number of novel Helicobacter species have been isolated from both animals and humans. Many of these helicobacters colonize the lower gastrointestinal tract and hepatobiliary tract and are associated with diseases. METHODS: A spiral-shaped bacterium, with bipolar single-sheathed flagella, was isolated from the liver and cecum of mastomys (the African rodent, Mastomys natalenis), from the feces and ceca of normal mice, and also from the cecum of a mouse with proctitis. 16S ribosomal RNA gene sequence analysis, restriction fragment length polymorphism (RFLP) and fluorophore-enhanced repetitive element polymerase chain reaction (FERP or rep-PCR) analysis were used to classify the organism. RESULTS: The bacterium grew at 37 and 42 degrees C under microaerobic conditions, rapidly hydrolyzed urea, and was catalase and oxidase positive. It did not reduce nitrate to nitrite, and was resistant to cephalothin and nalidixic acid. Like many other enterohepatic Helicobacter species, this organism expressed cytolethal distending toxin and causes cell distention. CONCLUSIONS: The organism was classified as a novel Helicobacter species for which we propose the name 'Helicobacter mastomyrinus'. Although 'H. mastomyrinus', like Helicobacter hepaticus and Helicobacter bilis, colonizes the liver of rodents, the pathogenic potential of this novel helicobacter is unknown.
Authors: Taranjit Kaur; Jatinder Singh; Michael A Huffman; Klára J Petrzelková; Nancy S Taylor; Shilu Xu; Floyd E Dewhirst; Bruce J Paster; Lies Debruyne; Peter Vandamme; James G Fox Journal: Appl Environ Microbiol Date: 2011-01-28 Impact factor: 4.792
Authors: Michelle L Turk; Laura D Cacioppo; Zhongming Ge; Zeli Shen; Mark T Whary; Nicola Parry; Samuel R Boutin; Hilton J Klein; James G Fox Journal: J Med Microbiol Date: 2012-02-02 Impact factor: 2.472
Authors: Michael Y Esmail; Rebecca Bacon; Alton G Swennes; Yan Feng; Zeli Shen; AnaPatricia Garcia; Prachi Sharma; Joyce Cohen; James G Fox Journal: Helicobacter Date: 2015-10-19 Impact factor: 5.753
Authors: Z Shen; A Mannion; M T Whary; S Muthupalani; A Sheh; Y Feng; G Gong; P Vandamme; H R Holcombe; B J Paster; J G Fox Journal: Infect Immun Date: 2016-07-21 Impact factor: 3.441
Authors: Zeli Shen; Yan Feng; Alexander Sheh; Jeffrey Everitt; Frederick Bertram; Bruce J Paster; James G Fox Journal: J Med Microbiol Date: 2015-06-30 Impact factor: 2.472
Authors: L S Mansfield; J S Patterson; B R Fierro; A J Murphy; V A Rathinam; J J Kopper; N I Barbu; T J Onifade; J A Bell Journal: Microb Pathog Date: 2008-06-11 Impact factor: 3.738